diff --git a/Authsignal.podspec b/Authsignal.podspec
index 6af0f05..d8a4db2 100644
--- a/Authsignal.podspec
+++ b/Authsignal.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'Authsignal'
-  s.version          = '1.5.2'
+  s.version          = '1.6.0'
   s.summary          = 'The Authsignal SDK for iOS'
 
   s.homepage         = 'https://github.com/authsignal/authsignal-ios'
diff --git a/Sources/Authsignal/AuthsignalPasskey.swift b/Sources/Authsignal/AuthsignalPasskey.swift
index 96c1967..d6d0e21 100644
--- a/Sources/Authsignal/AuthsignalPasskey.swift
+++ b/Sources/Authsignal/AuthsignalPasskey.swift
@@ -13,7 +13,12 @@ public class AuthsignalPasskey {
     passkeyManager = PasskeyManager()
   }
 
-  public func signUp(token: String? = nil, username: String? = nil, displayName: String? = nil) async -> AuthsignalResponse<SignUpResponse> {
+  public func signUp(
+    token: String? = nil,
+    username: String? = nil,
+    displayName: String? = nil,
+    ignorePasskeyAlreadyExistsError: Bool = false
+  ) async -> AuthsignalResponse<SignUpResponse> {
     guard let userToken = token ?? cache.token else { return cache.handleTokenNotSetError() }
     
     let optsResponse = await api.registrationOptions(token: userToken, username: username, displayName: displayName)
@@ -33,8 +38,12 @@ public class AuthsignalPasskey {
       existingCredentialIds: optsData.options.excludeCredentials.map { $0.id }
     )
     
+    if ignorePasskeyAlreadyExistsError && credentialResponse.errorCode == SdkErrorCodes.matchedExcludedCredential {
+      return AuthsignalResponse(error: nil)
+    }
+    
     if let error = credentialResponse.error {
-      return AuthsignalResponse(error: error)
+      return AuthsignalResponse(error: error, errorCode: credentialResponse.errorCode)
     }
 
     guard let credential = credentialResponse.data else {
@@ -149,6 +158,24 @@ public class AuthsignalPasskey {
     }
   }
   
+  public func shouldPromptToCreatePasskey() async -> AuthsignalResponse<Bool> {
+    guard let credentialId = UserDefaults.standard.string(forKey: passkeyLocalKey) else {
+      return AuthsignalResponse(data: true)
+    }
+    
+    let passkeyAuthenticatorResponse = await api.getPasskeyAuthenticator(credentialId: credentialId)
+    
+    if passkeyAuthenticatorResponse.errorCode == SdkErrorCodes.invalidCredential  {
+      return AuthsignalResponse(data: true)
+    }
+    
+    return AuthsignalResponse(
+      data: false,
+      error: passkeyAuthenticatorResponse.error,
+      errorCode: passkeyAuthenticatorResponse.errorCode
+    )
+  }
+  
   @available(*, deprecated, message: "Use 'preferImmediatelyAvailableCredentials' to control what happens when a passkey isn't available.")
   public func isAvailableOnDevice() async -> AuthsignalResponse<Bool> {
     guard let credentialId = UserDefaults.standard.string(forKey: passkeyLocalKey) else {
diff --git a/Sources/Authsignal/Models/SdkErrorCodes.swift b/Sources/Authsignal/Models/SdkErrorCodes.swift
new file mode 100644
index 0000000..f121a56
--- /dev/null
+++ b/Sources/Authsignal/Models/SdkErrorCodes.swift
@@ -0,0 +1,5 @@
+struct SdkErrorCodes {
+  static let userCanceled = "user_canceled"
+  static let invalidCredential = "invalid_credential"
+  static let matchedExcludedCredential = "matched_excluded_credential"
+}
diff --git a/Sources/Authsignal/Security/PasskeyManager.swift b/Sources/Authsignal/Security/PasskeyManager.swift
index 92d017e..4ce7686 100644
--- a/Sources/Authsignal/Security/PasskeyManager.swift
+++ b/Sources/Authsignal/Security/PasskeyManager.swift
@@ -91,7 +91,7 @@ class PasskeyManager: NSObject {
          authError.code == .matchedExcludedCredential {
         return AuthsignalResponse(
           error: "An existing credential is already available for this device.",
-          errorCode: "matched_excluded_credential"
+          errorCode: SdkErrorCodes.matchedExcludedCredential
         )
       }
       
@@ -181,7 +181,7 @@ class PasskeyManager: NSObject {
       
       return AuthsignalResponse(
         error: "The request was canceled by the user or the device has no passkeys available.",
-        errorCode: "user_canceled"
+        errorCode: SdkErrorCodes.userCanceled
       )
     } catch {
       self.controller = nil